Robert Allan JamesandClaude Sonnet 5
d9da82b065
Increment 2: WIREBIND user VMs (the ones that actually run FORTH work; console VMs are pure REPL proxies and never participate) register as Stage 3 switch-signal participants at attach, unregister at teardown. Slot table bumped 8 -> 16, matching messaging.4th's own VM-MAX -- a real, already-agreed ceiling, not an invented number. Added sk_vm_switch_signal_unregister() (compaction-based; Tripod VMs never needed removal, WIREBIND VMs cycle constantly and would otherwise exhaust the bounded table). Increment 3: implements the plan's own ratified option (A) for the async-detach UAF risk -- mark-and-defer via a new pending_reap flag on VMRegistryEntry, deliberately not a new VMState (capsule_vm_kill() already treats VM_STATE_DEAD as idempotent success, which would silently swallow a reap attempt; SWITCHED_OUT still accurately describes a tombstoned VM until the moment it's actually freed). unclean_detach() sets it when capsule_vm_kill() refuses a SWITCHED_OUT target; the Stage 3 checkpoint (vm_core.c) checks it before ever attempting to resume a pending switch target, and calls the new capsule_vm_force_reap() instead -- the one caller allowed to bypass capsule_vm_kill()'s own refusal, because it runs at the exact safe cooperative point the switcher itself controls. A new idle-tick sweep cleans up the WIREBIND live-table entry once the reap has actually happened. Verified clean on all 3 architectures (baseline regression -- no WIREBIND attach happens in a plain boot). The reap mechanism's own correctness under a genuinely parked context is verified separately, next, via a temporary deterministic probe. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BWpNjdwPtFLuVLaAq44L9K
capsules/
FORTH personality files loaded by the VM at boot. A capsule is an immutable, content-addressed payload; its XXHash64 hash is its identity. Any mutation changes the hash and the birth protocol rejects the image.
Key files
| File | Type | Purpose |
|---|---|---|
init.4th |
(m) MAMA_INIT |
Default Mama VM personality — loaded at LBN 2048 |
ACL.4th |
user | Word-level ACL system; self-activating at boot |
zuse.4th |
user | Bootstrap superuser; loaded by ACL.4th |
doe.4th |
user | DoE workload words (EXEC-DOE) — opt-in |
workload-0.4th … workload-9.4th |
(p) |
Numbered personality variants |
init-l8-*.4th |
(p) |
L8 Jacquard mode variants (stable/volatile/diverse/temporal/transition/omni) |
hermes/init.4th |
(p) |
Hermes baby VM personality |
artemis/init.4th |
(p) |
Artemis baby VM personality |
Block namespace
Block ranges are shared across all loaded capsules — collisions cause silent word-definition overwrites.
| Range | Owner |
|---|---|
| 2048–2099 | init.4th |
| 2100–2199 | doe.4th |
| 3000–3999 | workload capsules |
| 4000+ | user-defined (ACL.4th, zuse.4th, …) |
Each block is limited to 1024 bytes. Verify with wc -c before committing.
See also
experiments/bare_metal/README.md— DoE protocols and block namespace rulesdocs/03-architecture/word-acl/DESIGN.md— ACL system designtools/mkcapsule.c— assembles capsules intocapsule_generated.c- Project root